]> git.karo-electronics.de Git - linux-beck.git/commit
cpufreq: Add stop CPU callback to cpufreq_driver interface
authorDirk Brandewie <dirk.j.brandewie@intel.com>
Wed, 19 Mar 2014 15:45:53 +0000 (08:45 -0700)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Thu, 20 Mar 2014 02:50:12 +0000 (03:50 +0100)
commit367dc4aa932bfb33a3189064d33f7890a8ec1ca8
treefde9bd6004ff7852da144a373dd1c0536521efef
parentbda9f552f9826313ef8a477fc8e4891de9ae5e73
cpufreq: Add stop CPU callback to cpufreq_driver interface

This callback allows the driver to do clean up before the CPU is
completely down and its state cannot be modified.  This is used
by the intel_pstate driver to reduce the requested P state prior to
the core going away.  This is required because the requested P state
of the offline core is used to select the package P state. This
effectively sets the floor package P state to the requested P state on
the offline core.

Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
[rjw: Minor modifications]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Documentation/cpu-freq/cpu-drivers.txt
drivers/cpufreq/cpufreq.c
include/linux/cpufreq.h